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collective security

British  

noun

  1. a system of maintaining world peace and security by concerted action on the part of the nations of the world

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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Though “American hegemony” offered some benefits—“open sea lanes, a stable financial system, collective security and support for frameworks for resolving disputes”—it also required collective self-deception.

From The Wall Street Journal • Jan. 30, 2026

Prince Harry said the sacrifices of troops needed to be respected as he pointed out Nato's collective security clause had been invoked once - following the 9/11 attacks.

From BBC • Jan. 24, 2026

In fact, following the 9/11 attacks, the UK and a number of other allies joined the US from 2001 in Afghanistan after it invoked NATO's collective security clause.

From Barron's • Jan. 23, 2026

“We will have to decide how best to protect our security interests, which, as allies, should be our collective security interests,” he added.

From New York Times • Mar. 14, 2024

It is important, however, to distinguish clearly between the principle of collective security embodied in the Charter and the mechanisms of the United Nations to give that principle effect.

From State of the Union Address by Truman, Harry S.